central meaning, definition, what is central: in, at, from, or near the centre or most important part of something: . Learn more.
For other meanings of the term, see backfire (disambiguation). A back-fire or backfire is combustion or an explosion produced by a running internal combustion engine that occurs in the air intake or exhaust system rather than inside the combustion chamber.
How to Repair a Small-Engine Ignition System. An ignition system in a small engine produces and delivers the high-voltage spark that ignites the fuel-air mixture to cause the combustion.Some small engines require a battery to supply electrical power and the ignition spark.Others develop the ignition spark using a magneto. A small engine ignition includes the ignition controller (mechanical-breaker, capacitor-discharge, or transistor-controlled), spark plugs, flywheel, and wiring.Servicing the ignition system of your small engine depends on which types of components it has.tep 4: Visually inspect the magnet and ignition coil mounted next to the flywheel. Look for damage to the end of the magnet or the edge of the flywheel. The spark plug in a small gas engine must withstand high voltage, high heat, and millions of ignitions during its life.